Here are some tips.
1. Get
Market Samurai and research some keywords relevant to your niche, then use the tool to find available domains.
2. Register your domain and immediately install Wordpress on the domain with 200-300 words posted relating to your new site.
3. Use
Market Samurai to research long tail keywords that attract traffic and you have hope of ranking with.
4. Post relevant posts to your content from your affiliate programs of choice that include the keywords you have researched.
5. Repeat.
Make 3 good quality posts per day for 4 weeks, then a few posts a week thereafter. If you follow this strategy you can have reasonable traffic in no time.